Router in bridge mode

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I have a 2621 router leftin town A, settings as below. I have a 2621 router
right in town B, settins as below. I cannot change the ip addresses or
interfaces.
To connect them I thought I could use a router in bridge mode and made a
config 'middle' as below. It doesn't work. What is a good solution for this
problem? Help.

Router left:
int f0/0
description connected to bridge in the middle via x-cable
ip addr 10.10.10.2 255.255.255.0
no shut
int f0/1
description connected to NATO network
ip addr 172.16.20.1 255.255.255.0
no shut

Router middle:
int f0/0
description connected to router left via x-cable
bridge-group 1
no shut
int s0/0
description connected to router right via serial cable
bridge-group 1
no shut

Router right:
int f0/0
description connected to ICC network
ip addr 172.16.10.1 255.255.255.0
no shut
int s0/0
description connected to router middle via serial cable
ip addr 10.10.10.1 255.255.255.252
clo rat 64000
no shut



Re: Router in bridge mode
Not sure about the entire setup, but I do note you have a /30 subnet mask on
Right's s0/0 and a /24 on Left's f0/0.

Not sure about this one at all - if you don't run ip classless, I'm not
certain your two 172.16.0.0 networks can see each other, unless you're using
a static route on each end.

Good luck.

mjt

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Re: Router in bridge mode
The /24 is a typo, should be /30 om both sides.
I added 'no ip routing' in the midde and default routes on left and right.
It works with ethernet on both WAN-links but 'middle'doesn't work as an
encapsulation bridge from ethernet to serial end vice versa. So I need a
soltion.
Hans

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